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Report | May 2017

Rieter Combing: Technologically at forefront

The new combing set achieves the greatest productivity worldwide. The technology advantage of Rieter combing is based on the optimal interaction between machine and technology components, thinks Yvan Schwartz.

Confirmation of this strength, not only in the laboratory but especially under real production conditions with different cotton types, is Rieter s guarantee for the customers success. The technological resp. qualitative and economical benefits are illustrated as follows.

E 36 OMEGAlap

Thanks to continuous advancements, the OMEGAlap concept could be improved. An increase in production of 20 per cent to over 600 kg/h at a constant speed of up to 230 m/min is the result. With this production rate, the OMEGAlap is far superior to conventional machines. The influence of the OMEGAlap on the economic performance of a combing section is enormous. The high production allows a reduction in the number of preparatory machines. This noticeably reduces the number of can changes and sliver piecings. Fewer personnel are needed.

As an example, the personnel requirement of a combing set in a compact spinning facility with 76,000 spindles was calculated. Compared to other machine manufacturers, the personnel requirement can be reduced by three persons. This is realised by the efficient combing preparation, the SERVOlap fully automated lap transport system and the comber including the ROBOlap automated lap changing and piecing system (Figs. 1 and 2). The personnel saving for the combing preparation machine can be up to 20 per cent. That reduces the manufacturing costs by approximately $1,90,000 per year (basis Turkey).

E 86 Comber

The new E 86 comber features a speed increase of 10 per cent compared to the previous model. In the short and medium staple ranges, combing can be made with 550 nips per minute, and that without compromises in the combing quality. In practice, a Rieter combing set (1+6) supplies a plant with approximately 25,000 compact spindles.

The strength of the E 86 comber lies in a high level of cleaning as well as excellent running performance with high nip rates. The E 86 achieves fewer imperfections in the yarn (thin places, thick places, neps) at the same noil removal level compared to combers from other manufacturers. The high degree of cleaning has no effects on the fibre quality. That means, the fibre length remains unchanged and thus the yarn tenacity at a high level (Fig. 3).

Furthermore, the E 86 attains an improved dust and trash elimination of up to 20 per cent. The short fibre content, the hairiness as well as the evenness in the yarn remain unchanged (Fig. 5). That means, that in both examples, a higher cleaning effect is achieved by means of stronger combing intensity without compromises in the combing quality.

A further example from Southeast Asia shows better yarn quality with the E 86 compared to another manufacturer. At the same production performance and the same noil removal, the imperfections are lower by 40 per cent (Fig. 6).

The raw material is a considerable cost factor in the spinning mill. With the E 86 noil removal can be reduced by up to 1 per cent at equally good yarn quality (Fig. 7). That generates cost savings of up to $55,000 annually (example Central Asia).

The production performance also positively affects the costs of the spinning mill. The E 86 has the potential to achieve a 10 per cent higher production in comparison to the previous model, at the same noil removal and yarn quality (Fig. 8). That corresponds to a saving in manufacturing costs of about $20,000 per year and combing set (basis Turkey).

The right technologies for an efficient combing set

The E 86 comber with its high production at simultaneously high quality leads the way in combing. Individual quality demands can be realised thanks to high-value technology components. The established, fully-automated ROBOlap lap changing and piecing system is the standard for a modern combing facility. Together with the unique OMEGAlap preparation, the highest production per set on the market is achieved.

The article is authored by Yvan Schwartz, who is Head Product Management Combing at Rieter. The author can be contacted at:yvan.schwartz@rieter.com

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